Seafarer's Service Regulations Article 2

An unauthorized disembarking seafarer in a foreign country referred to in these Regulations means a seafarer that disembarks and leaves the vessel without justification or overstays the given leave.
中文原文 船員服務規則第2條
本規則所稱國外擅自離船船員,指船員在國外無故棄職離船或逾假不返者。

English translation for reference only; the Chinese text prevails. Not legal advice.